Disclosure of Invention
Based on the above, the application provides the light and thin anti-shrinkage urinary incontinence sling mesh and the preparation method thereof, and the urinary incontinence sling mesh has the advantages of light weight, small thickness, stable structure and low elongation, can remarkably reduce foreign body sensation, erosion and postoperative pain occurrence rate, and improves operation safety and patient comfort.
The application provides a light and thin anti-shrinkage urinary incontinence sling mesh, which has a changeable looped double-comb tissue structure, the thickness is less than or equal to 0.39mm, and is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn-laying tracks, the first group of monofilaments are arranged in a penetrating way on one yarn guiding comb, and each monofilament is looped on a knitting needle corresponding to the monofilament along the longitudinal yarn backing; the second group of monofilaments are arranged in a penetrating way on the other yarn guiding comb, and each monofilament is longitudinally and alternately yarn-padded and looped on the two left and right adjacent knitting needles of the corresponding first group of yarn-padded knitting needles.
In an embodiment of the application, the filaments of the two different sets of yarn-laying paths are in the form of open loops and/or closed loops on the knitting needles.
In the embodiment of the application, the aperture of the sling mesh is more than or equal to 1mm, the thickness is less than or equal to 0.39mm, the gram weight is less than or equal to 38g/m2, and the elongation at break is less than or equal to 45%.
In embodiments of the application, the strap mesh has a transverse density of 29 columns/inch or less and a longitudinal density of 17 columns/cm or less.
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 an embodiment of the application, the medical non-absorbable synthetic monofilament comprises a polypropylene monofilament, a polyester monofilament, a polyamide monofilament, or a polyvinylidene fluoride monofilament.
In an embodiment of the application, the thickness of the sling mesh ranges from 0.23 mm to 0.39mm; the pore diameter range is 1-2.5mm.
The application also provides a preparation method of the urinary incontinence sling mesh, which comprises the following steps:
Two front and back yarn guide combs are arranged on the warp knitting machine, two groups of monofilaments are respectively threaded on the two yarn guide combs and are in a hollow arrangement, and each monofilament of the first group is longitudinally padded and looped on a corresponding knitting needle; and knitting each monofilament of the second group on two adjacent knitting needles of the first group corresponding to the monofilament of the second group along the longitudinal direction in turn to form loops, and knitting to obtain the light and thin anti-shrinkage urinary incontinence suspender mesh.
In an embodiment of the application, the first set of monofilaments is threaded onto a front guide comb and the second set of monofilaments is threaded onto a rear guide comb;
or the first group of monofilaments is threaded on the rear yarn guide comb and the second group of monofilaments is threaded on the front yarn guide comb.
Compared with the prior art, the sling mesh is formed by weaving medical non-absorbable synthetic monofilaments through two groups of different yarn-laying tracks, wherein the first group of monofilaments are arranged in a penetrating way on the same yarn-guiding comb, and each monofilament is looped on a knitting needle corresponding to the monofilament along the longitudinal yarn-laying way; the second group of monofilaments are arranged in a penetrating way on the other yarn guiding comb, and each monofilament is longitudinally and alternately yarn-padded and looped on the two left and right adjacent knitting needles of the corresponding first group of yarn-padded knitting needles, namely the light and thin type double-comb structure with the variable loop and the thickness less than or equal to 0.39mm. The urinary incontinence sling mesh is of a light and thin anti-wrinkling design, can obviously reduce foreign body sensation, erosion and postoperative pain occurrence rate, and improves operation safety and comfort level of patients.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a light and thin anti-shrinkage urinary incontinence sling mesh, which has a changeable looping double-comb structure, has the thickness of less than or equal to 0.39mm, is formed by weaving two groups of medical non-absorbable synthetic monofilaments through different yarn-laying tracks, wherein the first group of monofilaments are arranged in a way of penetrating through a yarn-guiding comb, and each monofilament is looped on a knitting needle corresponding to the monofilament along the longitudinal yarn-laying direction; the second group of monofilaments are arranged in a penetrating way on the other yarn guiding comb, and each monofilament is longitudinally and alternately yarn-padded and looped on the two left and right adjacent knitting needles of the corresponding first group of yarn-padded knitting needles.
The embodiment of the application also provides a preparation method of the urinary incontinence sling mesh, which comprises the following steps of:
Installing front and back guide combs on a warp knitting machine, respectively threading two groups of monofilaments on the two guide combs, and threading the monofilaments into a hollow arrangement, wherein each monofilament of the first group is looped on a corresponding knitting needle along the longitudinal yarn-laying direction according to the designed yarn-laying track; and knitting each monofilament of the second group on two adjacent knitting needles of the first group corresponding to the monofilament of the second group along the longitudinal direction in turn to form loops, and knitting to obtain the light and thin anti-shrinkage urinary incontinence suspender mesh.
The urinary incontinence sling mesh provided by the application has the advantages of light weight and small thickness, can reduce foreign body sensation in a human body, has a stable structure and low elongation, can obviously reduce tissue erosion such as bladder and the like caused by sling deformation, reduces the incidence rate of postoperative pain, and improves operation safety and patient comfort.
According to the embodiment of the application, the urinary incontinence sling mesh with warp knitting tissue is prepared by adopting an original knitting process, so that the sling is light and thin and is resistant to wrinkle shrinkage, foreign body sensation, erosion and postoperative pain occurrence rate can be remarkably reduced, and operation safety and patient comfort are improved. In an embodiment of the application, the first set of monofilaments is threaded onto a front guide comb and the second set of monofilaments is threaded onto a rear guide comb; or the first group of monofilaments is threaded on the rear yarn guide comb and the second group of monofilaments is 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 a light and thin variable looping double-comb tissue structure; see also the yarn movement patterns of two sets of monofilaments for several embodiments of figures 1-6.
Corresponding to the variable looping double-comb structure, the threading mode and the yarn-laying track are as follows: the first group of monofilaments are arranged in a penetrating way on one yarn guiding comb, and each monofilament is looped on a knitting needle corresponding to the monofilament along the longitudinal yarn backing; the second group of monofilaments are penetrated through one space on the other yarn guiding comb, and each monofilament is longitudinally and alternately yarn-padded and looped on the two left and right adjacent knitting needles of the corresponding first group of yarn-padded knitting needles, so that a frivolous anti-shrinkage net sheet can be formed.
In an embodiment of the application, the filaments of the two different sets of yarn-laying tracks may be in the form of loops on the needles, either open loops or closed loops. According to the yarn-laying motion diagram, the two extension threads of the stitch cross and overlap at the base of the stitch, called closed stitch, and the non-cross and overlap are called open stitch.
Fig. 1 is a yarn-laying motion diagram of a light and thin anti-shrinkage sling mesh, wherein a front comb and a rear comb are both closed and looped, namely, each monofilament on the front comb is looped along a longitudinal closed yarn-laying direction on a corresponding knitting needle, and each monofilament on the rear comb is looped along the longitudinal alternate closed yarn-laying direction on two adjacent knitting needles on the left and right sides of the corresponding front comb yarn-laying knitting needle.
Fig. 2 is a diagram of a front comb loop-forming and a back comb open loop-forming yarn-laying motion of a light and thin anti-shrinkage sling mesh, namely, each monofilament on the front comb is looped along a longitudinal loop-forming yarn-laying direction on a corresponding knitting needle, and each monofilament on the back comb is looped along a longitudinal alternate open loop-laying direction on two knitting needles adjacent to the left and right of the corresponding front comb yarn-laying knitting needle.
Fig. 3 is a diagram of the yarn-laying motion of the front comb closing and back comb closing plus opening looping of the light and thin anti-shrink sling mesh, namely, each monofilament on the front comb is looped along the longitudinal closing yarn-laying on one knitting needle corresponding to the monofilament, and each monofilament on the back comb is looped along the longitudinal closing and then opening or opening and then closing alternately yarn-laying on two knitting needles adjacent to each other on the left and right of the corresponding front comb yarn-laying knitting needle.
Fig. 4 is a yarn-laying motion diagram of a light and thin anti-shrinkage sling mesh with open loops of a front comb and a rear comb, namely, each monofilament on the front comb is looped along a longitudinal opening on a corresponding knitting needle, and each monofilament on the rear comb is looped along a longitudinal alternate opening on two adjacent knitting needles on the left and right sides of the corresponding knitting needle.
Fig. 5 is a diagram of the yarn-laying motion of the front comb opening knitting and the back comb closing knitting of the light and thin anti-shrinkage sling mesh, namely, each monofilament on the front comb is laid along the longitudinal opening knitting on one knitting needle corresponding to the monofilament, and each monofilament on the back comb is laid along the longitudinal alternate closing knitting on two knitting needles adjacent to each other on the left and right sides of the corresponding front comb knitting needle.
Fig. 6 is a diagram of the front comb opening knitting, the back comb closing opening and opening knitting yarn-laying movement of the light and thin anti-shrinkage sling mesh, namely, each monofilament on the front comb is longitudinally opened and yarn-laid on a knitting needle corresponding to the front comb, and each monofilament on the back comb is longitudinally closed and then opened or alternately yarn-laid on two knitting needles adjacent to each other on the left and right sides of the corresponding front comb yarn-laying knitting needle.
In the specific embodiment of the application, the thickness of the light and thin anti-shrinkage sling mesh is less than or equal to 0.39mm, and further, the thickness range is 0.23-0.39mm; the pore diameter is more than or equal to 1mm, and further, the pore diameter range is 1-2.5mm (the pore diameter in the range refers to the whole range, and the pore diameter in the longitudinal and transverse directions of the structure can be expressed by a multiplication number, such as the transverse dimension and the longitudinal dimension); the gram weight is less than or equal to 38g/m2, and further, the gram weight range is 20-38g/m2. In addition, the elongation at break is less than or equal to 45%, and further, the elongation at break is in the range of 23% -45%. The net sheet is light and thin, has low elongation, can improve the operation safety and the comfort 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 longitudinal rows/inch, and the longitudinal density is less than or equal to 17 transverse rows/cm. In some embodiments of the application, the strap mesh has a transverse density of 11-29 columns/inch and a longitudinal density of 6-17 columns/cm.
The sling mesh is a double-comb tissue mesh with a changed loop, which is formed by weaving medical non-absorbable synthetic monofilaments; among them, 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 can be specifically 0.05mm-0.15mm and the like; the medical polypropylene (PP) monofilament, polyester (PET) monofilament, polyamide (PA) monofilament or polyvinylidene fluoride (PVDF) monofilament and the like, wherein the breaking strength of the monofilament is more than or equal to 3gf/d, and the breaking elongation is more than or equal to 10%.
The sling mesh disclosed by the application is wide in applicable raw material variety, and the sling mesh prepared from different raw materials can meet the requirements of patients with different urinary incontinence degrees.
The preparation flow of the light and thin suspender mesh sheet which is not easy to deform is as follows: preparing before braiding, shaping and post-treatment; the specific operation of braiding is as follows:
And installing front and back guide bars on a warp knitting machine, respectively threading two groups of yarns on the two guide bars, and threading an empty form on each guide bar, wherein as shown in a yarn-laying motion diagram of the embodiment of the application, each monofilament of the first group is longitudinally laid on a corresponding knitting needle, and each monofilament of the second group is longitudinally and alternately laid on two adjacent knitting needles on the left and right sides of the corresponding front yarn-laying knitting needle to form a loop, so that the light and thin anti-shrinkage suspender mesh fabric is knitted.
The embodiment of the application has a plurality of knitting forming paths of the light and thin suspender meshes which are not easy to deform, and can be knitted into a wide mesh firstly and then cut into a standard strip or a strip form with narrow ends and wide middle, and also can be directly knitted into a strip; and the two ends of the strip can be combined with various accessories, the two tail ends are convenient to process and can be combined with the anchor, so that the requirements of different operation modes are met, and the applicability is wide.
In addition, the preparation process of the sling mesh is stable and efficient, is beneficial to reducing the cost and lightens the economic burden of patients.
For further understanding of the present application, the light and thin type anti-shrink urinary incontinence sling mesh provided by the present application and the method for preparing the same are specifically described below with reference to examples. The raw materials used in the following examples of the present application are all commercially available.
Example 1
Selecting light and thin anti-shrinkage sling mesh materials:
in this example, medical polypropylene monofilaments were used as the raw materials, and the properties thereof are shown in table 1.
Table 1 material selection and Properties
| Raw material type | Diameter (mm) | Breaking strength (gf/d) | Elongation at break (%) |
| PP monofilament | 0.13 | 5.2 | 18 |
Weaving process parameters of the light and thin anti-shrinkage sling mesh sheet: the light and thin type shrink-resistant suspender mesh is knitted by a warp knitting machine, and the specific on-machine process is shown in table 2.
Table 2 knitting process parameters
Light and thin type shrink-resistant sling mesh performance data:
Breaking strength and elongation test method reference GB/T3923.1 section 1 of textile fabric tensile Property: determination of breaking Strength and elongation at break (bar sample method), thickness and bore diameter test method referring to the pharmaceutical industry Standard YY0500 cardiovascular implant, test results are as follows:
TABLE 3 sling mesh performance data for this example
| Thickness (mm) | Gram weight (g/m2) | 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-shrink strap mesh and the strap products in the market
| Product(s) | Thickness (mm) | Gram weight (g/m2) | Aperture (mm) | Elongation at break (%) |
| The sling mesh sheet of the embodiment | 0.32 | 30 | 2*2.5 | 37 |
| Strong-living sling product | 0.63 | 100 | 1.3*1.7 | 108 |
| Boston scientific sling product | 0.66 | 100 | 1.2*1.5 | 107 |
| AMS sling products | 0.66 | 110 | 1*1.1 | 115 |
As can be seen from the comparison of the data in Table 4, the elongation at break of the light and thin type anti-shrinkage sling mesh of the present embodiment is significantly lower than that of the sling products of Qiangsheng, boston science and AMS, and is thinner than those, which means that the light and thin type anti-shrinkage sling mesh of the present embodiment has significant advantages in reducing foreign body sensation, anti-shrinkage and pain occurrence rate after operation of patients compared with the sling products on the market.
Example 2
Selecting light and thin anti-shrinkage sling mesh materials:
in this example, medical polyvinylidene fluoride monofilaments were used as raw materials, and the properties thereof are shown in table 5.
TABLE 5 selection of materials and Properties
| Raw material type | Diameter (mm) | Breaking strength (gf/d) | Elongation at break (%) |
| PVDF monofilament | 0.15 | 3 | 26 |
Weaving process parameters of the light and thin anti-shrinkage sling mesh sheet: the light and thin type shrink-resistant suspender mesh is knitted by a warp knitting machine, and the specific on-machine process is shown in Table 6.
TABLE 6 knitting process parameters
Light and thin type shrink-resistant sling mesh performance data:
After the mesh woven according to the yarn-laying track is subjected to post-treatment such as sizing, performance test (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/m2) | Aperture (mm) | Breaking strength (N) | Elongation at break (%) |
| 0.39 | 38 | 2.4*2.3 | 49 | 45 |
Example 3
Selecting light and thin anti-shrinkage sling mesh materials:
in this example, medical polyester monofilaments were used as the raw materials, and the properties thereof are shown in Table 8.
Table 8 material selection and Properties
| Raw material type | Diameter (mm) | Breaking strength (gf/d) | Elongation at break (%) |
| PET monofilament | 0.05 | 6.8 | 22 |
Weaving process parameters of the light and thin anti-shrinkage sling mesh sheet: the light and thin type shrink-resistant suspender mesh is knitted by a warp knitting machine, and the specific on-machine process is shown in table 9.
Table 9 knitting process parameters
Light and thin type shrink-resistant sling mesh performance data:
And performing performance test on the mesh woven according to the yarn-laying track after post-treatment such as shaping, wherein the test result is as follows:
table 10 this example sling mesh performance data
| Thickness (mm) | Gram weight (g/m2) | Aperture (mm) | Breaking strength (N) | Elongation at break (%) |
| 0.23 | 20 | 1*1.3 | 37 | 23 |
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.