CN113846415B - Light and thin type anti-shrinkage urinary incontinence sling mesh and preparation method thereof - Google Patents
Light and thin type anti-shrinkage urinary incontinence sling mesh and preparation method thereof Download PDFInfo
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- CN113846415B CN113846415B CN202111306259.5A CN202111306259A CN113846415B CN 113846415 B CN113846415 B CN 113846415B CN 202111306259 A CN202111306259 A CN 202111306259A CN 113846415 B CN113846415 B CN 113846415B
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- 206010046543 Urinary incontinence Diseases 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000009940 knitting Methods 0.000 claims abstract description 72
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 238000009941 weaving Methods 0.000 claims abstract description 10
- 239000002033 PVDF binder Substances 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 210000001520 comb Anatomy 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000008520 organization Effects 0.000 claims 1
- 208000004550 Postoperative Pain Diseases 0.000 abstract description 8
- 230000035807 sensation Effects 0.000 abstract description 8
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 206010005063 Bladder pain Diseases 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 14
- 239000002994 raw material Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 210000003708 urethra Anatomy 0.000 description 5
- 206010066218 Stress Urinary Incontinence Diseases 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 208000035965 Postoperative Complications Diseases 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 208000002193 Pain Diseases 0.000 description 1
- 206010062558 Vaginal erosion Diseases 0.000 description 1
- 230000001153 anti-wrinkle effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 206010041232 sneezing Diseases 0.000 description 1
- 208000022170 stress incontinence Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
- D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/06—Patterned fabrics or articles
- D04B21/08—Patterned fabrics or articles characterised by thread material
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Woven Fabrics (AREA)
- Knitting Of Fabric (AREA)
Abstract
The application belongs to the field of medical appliances, and provides a light and thin type anti-shrinkage urinary incontinence sling mesh and a preparation method thereof, wherein the sling mesh has a changeable looped double-comb structure, the thickness 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 in a way of penetrating through a yarn-guiding comb, and each monofilament is looped on a knitting needle corresponding to the monofilament along a 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 urinary incontinence sling mesh is of a light and thin anti-shrinkage design, can remarkably reduce the occurrence rate of tissue erosion such as foreign body sensation and bladder and postoperative pain, and improves the operation safety and the comfort level of patients.
Description
Technical Field
The application belongs to the technical field of medical appliances, and relates to a urinary incontinence sling, in particular to a light and thin anti-shrinkage urinary incontinence sling mesh and a preparation method thereof.
Background
Stress incontinence refers to involuntary leakage of urine from the urethral orifice when the abdominal pressure increases, such as sneezing, coughing, laughing, or exercise. The prevalence rate of adult female stress urinary incontinence in China is up to 18.9%, and the prevalence rate of female in the age of 50-59 years is up to 28.0%, so that the work and life of patients are seriously affected. The vaginal tensionless urethral middle suspension belt has become a first-line surgical treatment method for patients suffering from stress urinary incontinence due to the characteristics of higher cure rate, minimally invasive simplicity and convenience and the like. The procedure is typically performed using a synthetic mesh tape suspended in the middle of the urethra without tension, the mesh tape placed behind the side of the middle of the urethra, and as abdominal pressure increases the mesh tape creates pressure in the middle of the urethra so that leakage of urine is controlled. Although the vagina tension-free urethra middle section sling operation improves the cure rate, the complications such as stronger foreign body sensation, bladder urethra vaginal erosion, postoperative pain and the like of partial patients still exist, and serious discomfort is caused to the patients.
In order to reduce the occurrence rate of postoperative complications, chinese patent document with grant publication No. CN 207012267U discloses a urinary incontinence sling with a braided structure, which comprises a mesh, and the mesh has a braided mesh and a plurality of braided structures arranged side by side, and the extending direction of the braided structures on the mesh is consistent with the stress direction of the sling after implantation. The suspended belt mesh is rectangular, has lower longitudinal elongation, can reduce partial postoperative complications to a certain extent, but is hard, and can increase the incidence rate of postoperative discomfort. Moreover, the strap products on the market are prone to shrinkage and deformation, so that the pressure on tissues is exerted and the cutting effect is caused, and the postoperative pain of patients is caused more and more.
Therefore, there is a need to develop a thin anti-wrinkle sling mesh to reduce the incidence of foreign body sensation, tissue erosion such as bladder and postoperative pain while ensuring cure rate, and to improve the postoperative comfort of patients.
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/m 2, 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.
Drawings
FIG. 1 is a diagram of the movement of two sets of monofilament closed loop yarn for a backing in accordance with a first type of embodiment of the present application;
FIG. 2 is a diagram of the yarn laying motions of a first set of closed loop forming filaments and a second set of open loop forming filaments according to a second class of embodiments of the present application;
FIG. 3 is a diagram of the yarn laying motions of a first set of closed loop forming filaments and a second set of open and closed loop forming filaments according to a third class of embodiments of the present application;
FIG. 4 is a diagram of the movement of a yarn backing with two sets of monofilaments open loop in accordance with a fifth class of embodiments of the present application;
FIG. 5 is a diagram of the movement of a yarn carrier with a first set of open loops and a second set of closed loops of filaments according to a fourth embodiment of the application;
figure 6 is a diagram of the movement of a first set of open loop and a second set of closed loop plus open loop yarn for a sixth embodiment of the application.
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/m 2, and further, the gram weight range is 20-38g/m 2. 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/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-shrink strap mesh and the strap products in the market
| Product(s) | Thickness (mm) | Gram weight (g/m 2) | 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/m 2) | 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/m 2) | 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.
Claims (5)
1. The light and thin type anti-shrinkage urinary incontinence sling mesh is characterized in that the sling mesh has a changeable looping double-comb organization structure, and 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 penetrating way on one 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 penetrated through one space on the other yarn guiding comb, and each monofilament is longitudinally and alternately padded and looped on two knitting needles adjacent to the left and right of the corresponding first group of yarn padding knitting needles;
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/m 2, and the elongation at break is less than or equal to 45%; 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; 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%; the medical non-absorbable synthetic monofilament comprises a polypropylene monofilament, a polyester monofilament, a polyamide monofilament or a polyvinylidene fluoride monofilament.
2. The urinary incontinence sling mesh as claimed in claim 1, wherein the filaments of said two different sets of yarn-laying tracks are looped on a knitting needle in the form of open loops and/or closed loops.
3. The urinary incontinence sling mesh as claimed in any one of claims 1-2, wherein said sling mesh has a thickness in the range of 0.23-0.39mm; the pore diameter range is 1-2.5mm.
4. A method of making a urinary incontinence sling mesh as defined in any of claims 1-3, comprising the steps of: 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.
5. The method of making as defined in claim 4, wherein the first set of filaments is threaded onto a front guide comb and the second set of filaments 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.
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| CN202111306259.5A CN113846415B (en) | 2021-11-05 | 2021-11-05 | Light and thin type anti-shrinkage urinary incontinence sling mesh and preparation method thereof |
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