CN113846415A - Light and thin anti-shrinkage urinary incontinence sling mesh and preparation method thereof - Google Patents

Abstract

The application belongs to the field of medical instruments, and provides a light and thin type anti-shrinking urinary incontinence sling mesh and a preparation method thereof, wherein the sling mesh has a variable looping double-comb structure, the thickness of the sling mesh is less than or equal to 0.39mm, the sling mesh is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn laying tracks, the first group of monofilaments are arranged on a yarn guide comb in a penetrating and empty mode, and each monofilament is looped on a corresponding knitting needle along the longitudinal yarn laying; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction. This application incontinence suspender net piece is frivolous anti wrinkle design, can show the incidence that reduces tissue erosion such as foreign body sensation, bladder and postoperative pain, improves operation security and patient's comfort level.

Description

Light and thin anti-shrinkage urinary incontinence sling mesh and preparation method thereof

Technical Field

The application belongs to the technical field of medical instruments, relates to a urinary incontinence hanging belt, and particularly relates to a light and thin anti-shrinking urinary incontinence hanging belt mesh and a preparation method thereof.

Background

Stress incontinence refers to involuntary leakage of urine from the urethral orifice when abdominal pressure increases, such as sneezing, coughing, laughing, or exercise. The prevalence rate of stress urinary incontinence of adult women in China is as high as 18.9%, and the prevalence rate of women in the age range of 50-59 years is as high as 28.0%, so that the work and life of patients are seriously influenced. The vaginal tension-free urethra middle section sling has the characteristics of high cure rate, simple and convenient minimally invasive operation and the like, and becomes a first-line operation treatment method for patients with stress urinary incontinence. In general, a synthetic mesh belt is used for tension-free urethral middle section suspension in an operation, the mesh belt is placed behind the urethral middle section side without tension, and when abdominal pressure is increased, the mesh belt forms pressure on the urethral middle section to control urine leakage. Although the vaginal tension-free mid-urethra sling surgery improves the cure rate, some patients still have complications such as strong foreign body sensation, bladder urethra and vagina erosion, postoperative pain and the like, and serious discomfort is caused to the patients.

In order to reduce the incidence of postoperative complications, chinese patent publication No. CN 207012267U discloses a urinary incontinence suspension belt having a pillar structure, which includes a mesh sheet, and the mesh sheet has a knitted mesh and a plurality of pillar structures arranged side by side, and the extending direction of the pillar structures on the mesh sheet is the same as the stress direction of the suspension belt after implantation. The mesh of the suspension belt is rectangular, has low longitudinal elongation, can reduce postoperative partial complications to a certain extent, but is hard, and can increase the incidence of postoperative discomfort. Moreover, the sling products in the market are easy to shrink and deform, so that the sling products have pressure cutting effect on tissues, and the postoperative pain of patients is more and more caused.

Therefore, there is a need to develop a light and thin anti-wrinkle mesh for sling compression to reduce the incidence of foreign body sensation, erosion of tissues such as bladder, and postoperative pain while ensuring the cure rate, and to improve the postoperative comfort of the patient.

Disclosure of Invention

Based on the above, the application provides a light and thin type anti-shrinking urinary incontinence sling mesh and a preparation method thereof, the urinary incontinence sling mesh is light in weight, small in thickness, stable in structure and low in elongation, can remarkably reduce the incidence rate of foreign body sensation, erosion and postoperative pain, and improves the operation safety and the comfort level of patients.

The application provides a light and thin type anti-shrinking urinary incontinence sling mesh sheet, the sling mesh sheet has a variable looping double comb tissue structure, the thickness is less than or equal to 0.39mm, the sling mesh sheet is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn laying tracks, the first group of monofilaments are arranged on a yarn guide comb in a penetrating and empty mode, and each monofilament is looped on a corresponding knitting needle along the longitudinal yarn laying; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is alternately laid on two left and right adjacent knitting needles of the corresponding first group of yarn laying knitting needles along the longitudinal direction to form loops.

In the embodiments of the present application, the loops of the monofilaments of the two different sets of laying tracks on the knitting needles are in the form of open loops and/or closed loops.

In the embodiment of the application, the aperture of the sling mesh sheet is more than or equal to 1mm, the thickness of the sling mesh sheet is less than or equal to 0.39mm, and the gram weight of the sling mesh sheet is less than or equal to 38g/m²And the elongation at break is less than or equal to 45 percent.

In the embodiment of the application, the transverse density of the sling mesh sheet is less than or equal to 29 columns/inch, and the longitudinal density of the sling mesh sheet is less than or equal to 17 rows/cm.

In the embodiment of the application, the diameter of the medical non-absorbable synthetic monofilament is less than or equal to 0.15mm, the breaking strength is more than or equal to 3gf/d, and the breaking elongation is more than or equal to 10%.

In embodiments of the present application, the medical non-absorbable synthetic monofilament comprises polypropylene monofilament, polyester monofilament, polyamide monofilament, or polyvinylidene fluoride monofilament.

In embodiments of the present application, the sling mesh has a thickness in the range of 0.23-0.39 mm; the aperture range is 1-2.5 mm.

The present application also provides a method of making a urinary incontinence sling mesh as described above, comprising the steps of:

the method comprises the following steps that a front yarn guide comb and a rear yarn guide comb are arranged on a warp knitting machine, two groups of monofilaments respectively penetrate through the two yarn guide combs and are arranged in a penetrating and empty mode, and each monofilament in a first group is laid on a corresponding knitting needle in a loop mode along the longitudinal direction; and (3) each monofilament in the second group is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction, so that the light and thin anti-shrinking urinary incontinence sling mesh sheet is obtained by knitting.

In an embodiment of the present application, the first set of monofilaments is threaded on the front guide comb and the second set of monofilaments is threaded on the rear guide comb;

or the first group of monofilaments are threaded on the rear yarn guide comb and the second group of monofilaments are threaded on the front yarn guide comb.

Compared with the prior art, the sling mesh sheet is formed by knitting medical non-absorbable synthetic monofilaments through two groups of different yarn laying tracks, the monofilaments of the first group are arranged on the same yarn guide comb in a penetrating and empty mode, and each monofilament is looped on a corresponding knitting needle along the longitudinal yarn laying; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is laid on two knitting needles which are adjacent to the left and right of the corresponding first group of yarn laying knitting needles in turn along the longitudinal direction to form a loop, namely a light and thin type variable loop double comb structure, wherein the thickness of the variable loop double comb structure is less than or equal to 0.39 mm. This application urinary incontinence suspender net piece is frivolous anti-wrinkle design, can show to reduce foreign body sensation, erosion and the painful incidence of postoperative, improves operation security and patient's comfort level.

Drawings

FIG. 1 is a movement diagram of a lapping yarn in which two groups of monofilaments are closed and looped according to a first type of embodiment of the present application;

FIG. 2 is a diagram of the movement of a first set of closed looped monofilaments and a second set of open looped monofilaments for a lay-up yarn according to a second type of embodiment of the present application;

FIG. 3 is a diagram of a lay-up yarn movement for a first set of monofilament closed-end looping and a second set of monofilament open-end closed-end looping yarns according to a third type of embodiment of the present application;

FIG. 4 is a diagram of the movement of a lapping yarn in which two sets of monofilaments are open looped according to a fifth type of embodiment of the present application;

FIG. 5 is a diagram of a lay-up yarn movement for a first set of monofilament open-looped and a second set of monofilament closed-looped yarns according to a fourth type of embodiment of the present application;

FIG. 6 is a diagram of a lapping movement of a first set of monofilament open looped, a second set of monofilament closed and open looped yarns according to a sixth class of embodiments of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a light and thin type anti-shrinking urinary incontinence sling mesh which has a variable looping double comb tissue structure, the thickness of the sling mesh is less than or equal to 0.39mm, the sling mesh is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn laying tracks, the first group of monofilaments are arranged on a yarn guide comb in a penetrating and empty mode, and each monofilament is looped on a corresponding knitting needle along the longitudinal yarn laying; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction.

The embodiment of the application also provides a preparation method of the urinary incontinence sling mesh, which comprises the following steps:

the method comprises the following steps that a front yarn guide comb and a rear yarn guide comb are arranged on a warp knitting machine, two groups of monofilaments respectively penetrate through the two yarn guide combs and are arranged in a penetrating and empty mode, and each monofilament in a first group is looped on a corresponding knitting needle along longitudinal yarn laying according to a designed yarn laying track; and (3) each monofilament in the second group is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction, so that the light and thin anti-shrinking urinary incontinence sling mesh sheet is obtained by knitting.

The utility model provides a urinary incontinence suspender net piece's light in weight, thickness are little, can reduce internal foreign body and feel, and in addition, net piece stable in structure and extension are low, can obviously reduce because tissues such as the bladder that the suspender warp and arouse corrode, reduce the painful incidence of postoperative, improve operation security and patient's comfort level.

The urinary incontinence suspender mesh of the warp-knitted tissue is prepared by adopting an original weaving process, can enable the suspender to be light and thin and resist shrinkage, can obviously reduce foreign body sensation, erosion and postoperative pain incidence, and improves operation safety and patient comfort. In an embodiment of the present application, the first set of monofilaments is threaded on the front guide comb and the second set of monofilaments is threaded on the rear guide comb; or the first group of monofilaments are threaded on the rear yarn guide comb and the second group of monofilaments are threaded on the front yarn guide comb.

The sling mesh sheet disclosed by the embodiment of the application is light in weight and small in thickness, is formed by weaving medical non-absorbable synthetic monofilaments through two groups of different yarn laying tracks, and is of a light and thin variable looped double-comb tissue structure; see the yarn laying movement diagrams of two groups of monofilaments of several classes of embodiments of figures 1 to 6.

Corresponding to the change looping double comb structure of this application, the threading mode, fill up the yarn orbit do: the first group of monofilaments are arranged on a yarn guide comb in a penetrating and empty mode, and each monofilament is laid on a corresponding knitting needle along the longitudinal direction to form a loop; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is looped on two knitting needles which are adjacent to the left and right of the corresponding first group of yarn laying knitting needles in turn along the longitudinal direction, so that the anti-shrinking light and thin net piece can be formed.

In the embodiment of the application, the loop formation of the monofilaments of the two different yarn laying tracks on the knitting needle can be an open loop or a closed loop. According to the yarn laying movement diagram, the two extending lines of the stitch are crossed and overlapped at the base of the stitch and are called closed stitch, and the stitch without crossing and overlapping is called open stitch.

FIG. 1 is a movement diagram of yarn laying of the front comb and the rear comb of a light and thin anti-crease shrinking sling net piece, wherein the front comb and the rear comb are closed and looped, namely, each monofilament on the front comb is closed and looped on a corresponding knitting needle longitudinally, and each monofilament on the rear comb is closed and looped on two adjacent knitting needles on the left and right of the corresponding knitting needle of the front comb yarn laying in turn longitudinally.

FIG. 2 is a drawing of the yarn laying motion of the front comb closed loop looping and the back comb open loop looping of the light and thin type anti-crease shrink sling mesh sheet, namely, each monofilament on the front comb is looped on a corresponding knitting needle along the longitudinal closed loop yarn laying, and each monofilament on the back comb is looped on two corresponding knitting needles which are adjacent to the front comb yarn laying knitting needle on the left and the right in turn along the longitudinal open loop yarn laying.

FIG. 3 is a drawing of a front comb closed loop and rear comb closed loop and open loop lapping motion of a light and thin anti-shrinkage sling mesh sheet, namely, each monofilament on a front comb is lapped and looped on a corresponding knitting needle along a longitudinal closed loop, and each monofilament on a rear comb is lapped and looped on two corresponding knitting needles adjacent to the left and right of the front comb lapping knitting needle along the longitudinal direction, wherein the knitting needles are closed first and then opened or opened first and then closed in turn.

FIG. 4 is a drawing showing the movement of the front comb and the back comb of the light and thin anti-shrinkage sling mesh, wherein each monofilament on the front comb is looped on a corresponding knitting needle along the longitudinal direction, and each monofilament on the back comb is looped on two adjacent knitting needles on the left and right of the corresponding knitting needle of the front comb in turn along the longitudinal direction.

FIG. 5 is a drawing showing the movement of front comb open loop and back comb closed loop lapping of a light and thin type anti-crimp sling mesh, i.e., each monofilament on the front comb is looped on a corresponding knitting needle along the longitudinal open loop lapping, and each monofilament on the back comb is looped on two adjacent knitting needles on the left and right of the corresponding front comb lapping knitting needle along the longitudinal direction by closing the lapping.

FIG. 6 is a movement diagram of front comb opening looping and rear comb closing and opening looping lapping of a light and thin type crease-resistant shrinking sling net piece, namely, each monofilament on a front comb is lapped and looped along a longitudinal opening on a corresponding knitting needle, and each monofilament on a rear comb is lapped and looped along a longitudinal opening first and then or alternately after opening and then closing on two adjacent knitting needles on the left and right of the corresponding front comb lapping knitting needle.

In an embodiment of the application, the thickness of the light and thin anti-shrinkage sling mesh sheet is less than or equal to 0.39mm, and further, the thickness range is 0.23-0.39 mm; the aperture is more than or equal to 1mm, furthermore, the aperture range is 1-2.5mm (the aperture in the range refers to the whole range, and the aperture in the longitudinal and transverse directions of the structure can also be represented by a multiplier, such as the transverse dimension and the longitudinal dimension); the gram weight is less than or equal to 38g/m²Further, the gram weight range is 20-38g/m². In addition, the elongation at break is less than or equal to 45 percent, and further the elongation at break ranges from 23 percent to 45 percent. The mesh is light and thin, has low elongation, can improve the operation safety and the comfort level of patients, and has obvious technical advantages.

According to the mesh process design, the transverse density of the sling mesh is less than or equal to 29 columns/inch, and the longitudinal density of the sling mesh is less than or equal to 17 rows/cm. In some embodiments of the present application, the sling mesh has a cross-directional density of 11-29 columns/inch and a machine-directional density of 6-17 rows/cm.

The sling mesh is a variable looped double comb mesh woven from medical non-absorbable synthetic monofilaments; wherein, the medical fiber material has good biocompatibility. In the embodiment of the application, the diameter of the medical non-absorbable synthetic monofilament is less than or equal to 0.15mm, and specifically can be 0.05mm-0.15 mm; the medical polypropylene/polyvinylidene fluoride composite material comprises medical polypropylene (PP) monofilaments, Polyester (PET) monofilaments, Polyamide (PA) monofilaments or polyvinylidene fluoride (PVDF) monofilaments and the like, wherein the breaking strength of the monofilaments is more than or equal to 3gf/d, and the breaking elongation is more than or equal to 10%.

The sling mesh sheet has wide raw material variety, and the sling mesh sheet prepared from different raw materials can meet the requirements of patients with different urinary incontinence degrees.

The preparation process of the light and thin sling mesh not easy to deform in the embodiment of the application is as follows: preparing before knitting, shaping and post-processing; the specific operation of weaving is as follows:

the front and rear guide bars are installed on a warp knitting machine, two groups of yarns are respectively threaded on the two guide bars, and each guide bar is in a one-thread-one-empty mode.

The light and thin sling mesh which is not easy to deform in the embodiment of the application has multiple knitting forming paths, can be knitted into a wide mesh firstly and then cut into a standard strip or a strip form with two narrow ends and a wide middle part, and can also be directly knitted into a strip; and the two ends of the strap can be combined with various accessories, the two tail end heads are convenient to process and can be combined with the anchor nails, the requirements of different operation types are met, and the applicability is wide.

In addition, the preparation process of the sling mesh sheet is stable and efficient, the cost is reduced, and the economic burden of patients is relieved.

For further understanding of the present application, the light weight, thin, crush resistant urinary incontinence sling mesh provided herein and methods of making the same are described in detail below with reference to the examples. The starting materials used in the following examples of the present invention are all commercially available products.

Example 1

Selection of light and thin type anti-wrinkle shrinking sling mesh sheet raw materials:

in this example, medical polypropylene monofilament is selected as a raw material, and the properties thereof are shown in table 1.

TABLE 1 Material selection and Properties

Kind of raw material	Diameter (mm)	Breaking Strength (gf/d)	Elongation at Break (%)
				PP monofilament	0.13	5.2	18

Weaving technological parameters of the light and thin type anti-wrinkle shrinkage sling mesh sheet are as follows: the light and thin anti-wrinkle mesh strip is knitted by a warp knitting machine, and the specific knitting process is shown in table 2.

TABLE 2 weaving Process parameters

Performance data of the light and thin anti-shrinkage sling mesh sheet:

the breaking strength and elongation test method refers to GB/T3923.1part 1 of tensile property of textile fabrics: the determination of breaking strength and breaking elongation (bar method), the thickness and pore diameter test method refer to the pharmaceutical industry standard YY0500 cardiovascular implant, and the test results are as follows:

table 3 sling mesh performance data for this example

Thickness (mm)	Gram weight (g/m)2)	Aperture (mm)	Breaking strength (N)	Elongation at Break (%)
					0.32	30	2*2.5	43	37

TABLE 4 comparison of the performance of the light and thin anti-shrinking sling mesh of the present embodiment with that of the commercial sling

Product(s)	Thickness (mm)	Gram weight (g/m)2)	Aperture (mm)	Elongation at Break (%)
					Strap mesh of the present embodiment	0.32	30	2*2.5	37
Strong sling product	0.63	100	1.3*1.7	108
					Boston science suspender product	0.66	100	1.2*1.5	107
AMS suspender product	0.66	110	1*1.1	115

As can be seen from the comparison of the data in table 4, the breaking elongation of the light and thin anti-wrinkle mesh strip of the present embodiment is significantly lower than and thinner than those of the mesh strips of qiangsheng, boston science and AMS, which indicates that the light and thin anti-wrinkle mesh strip of the present embodiment has significant advantages in reducing the foreign body sensation of the patient, resisting shrinkage and reducing the postoperative pain incidence of the patient, compared with the mesh strip products on the market.

Example 2

Selection of light and thin type anti-wrinkle shrinking sling mesh sheet raw materials:

in this example, medical polyvinylidene fluoride monofilament is selected as a raw material, and the properties thereof are shown in table 5.

TABLE 5 Material selection and Properties

Kind of raw material	Diameter (mm)	Breaking Strength (gf/d)	Elongation at Break (%)
				PVDF monofilament	0.15	3	26

Weaving technological parameters of the light and thin type anti-wrinkle shrinkage sling mesh sheet are as follows: the light and thin anti-wrinkle mesh strip is knitted by a warp knitting machine, and the specific knitting process is shown in table 6.

TABLE 6 knitting Process parameters

Performance data of the light and thin anti-shrinkage sling mesh sheet:

after the mesh woven according to the yarn laying track is subjected to post-treatment such as shaping and the like, a performance test (the test method is the same as that of example 1) is performed, and the test results are as follows:

table 7 sling mesh performance data for this example

Thickness (mm)	Gram weight (g/m)2)	Aperture (mm)	Breaking strength (N)	Elongation at Break (%)
					0.39	38	2.4*2.3	49	45

Example 3

Selection of light and thin type anti-wrinkle shrinking sling mesh sheet raw materials:

in this example, medical polyester monofilament is selected as a raw material, and the properties thereof are shown in table 8.

TABLE 8 Material selection and Properties

Kind of raw material	Diameter (mm)	Breaking Strength (gf/d)	Elongation at Break (%)
				PET monofilament	0.05	6.8	22

Weaving technological parameters of the light and thin type anti-wrinkle shrinkage sling mesh sheet are as follows: the light and thin anti-wrinkle mesh strip is knitted by a warp knitting machine, and the specific knitting process is shown in table 9.

TABLE 9 knitting Process parameters

Performance data of the light and thin anti-shrinkage sling mesh sheet:

after the net sheets woven according to the yarn laying track are subjected to post-treatment such as shaping and the like, performance tests are carried out, and the test results are as follows:

table 10 sling mesh performance data for this example

Thickness (mm)	Gram weight (g/m)2)	Aperture (mm)	Breaking strength (N)	Elongation at Break (%)
					0.23	20	1*1.3	37	23

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A light and thin type anti-shrinking urinary incontinence suspender mesh sheet is characterized in that the suspender mesh sheet has a variable looping double comb tissue structure, the thickness is less than or equal to 0.39mm, the suspender mesh sheet is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn laying tracks, the first group of monofilaments are arranged on a yarn guide comb in a penetrating and empty mode, and each monofilament is looped on a corresponding knitting needle along the longitudinal yarn laying; the second group of monofilaments are arranged on the other yarn guide comb in a penetrating and empty mode, and each monofilament is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction.

2. The urinary incontinence sling mesh of claim 1 wherein said two distinct sets of monofilament laid yarn tracks are formed as open loops and/or closed loops on knitting needles.

3. The urinary incontinence sling mesh sheet according to claim 1, wherein the sling mesh sheet has an aperture of not less than 1mm, a thickness of not more than 0.39mm, and a grammage of not more than 38g/m²And the elongation at break is less than or equal to 45 percent.

4. The urinary incontinence sling mesh of claim 1, wherein said sling mesh has a transverse density of 29 columns/inch or less and a longitudinal density of 17 rows/cm or less.

5. The urinary incontinence sling mesh sheet according to claim 1, wherein said medical non-absorbable synthetic monofilament has a diameter of 0.15mm or less, a breaking strength of 3gf/d or more, and an elongation at break of 10% or more.

6. The urinary incontinence sling mesh as recited in any one of claims 1-5, wherein said medical non-absorbable synthetic monofilaments comprise polypropylene monofilaments, polyester monofilaments, polyamide monofilaments or polyvinylidene fluoride monofilaments.

7. The urinary incontinence sling mesh of claim 6 wherein said sling mesh has a thickness in the range of 0.23-0.39 mm; the aperture range is 1-2.5 mm.

8. The method of making a urinary incontinence sling mesh as defined in any one of claims 1 to 7, including the steps of: the method comprises the following steps that a front yarn guide comb and a rear yarn guide comb are arranged on a warp knitting machine, two groups of monofilaments respectively penetrate through the two yarn guide combs and are arranged in a penetrating and empty mode, and each monofilament in a first group is laid on a corresponding knitting needle in a loop mode along the longitudinal direction; and (3) each monofilament in the second group is alternately lapped and looped on two left and right adjacent knitting needles of the corresponding first group of lapping knitting needles along the longitudinal direction, so that the light and thin anti-shrinking urinary incontinence sling mesh sheet is obtained by knitting.

9. The method of claim 8, wherein the first set of monofilaments are threaded on a front guide comb and the second set of monofilaments are threaded on a rear guide comb; or the first group of monofilaments are threaded on the rear yarn guide comb and the second group of monofilaments are threaded on the front yarn guide comb.

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