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High structural stability of textile implants prevents pore collapse and preserves effective porosity at strain.

Klinge U, Otto J, Mühl T - Biomed Res Int (2015)

Bottom Line: The latter mainly is affected by the size of the pores, whereas only sufficiently large pores are effective in preventing a complete scar entrapment.Comparing two different sling implants (TVT and SIS), which are used for the treatment of urinary incontinence, we can demonstrate that the measurement of the effective porosity reveals considerable differences in the textile construction.Furthermore the changes of porosity after application of a tensile load can indicate a structural instability, favouring pore collapse at stress and questioning the use for purposes that are not "tension-free."

View Article: PubMed Central - PubMed

Affiliation: Department for General, Visceral and Transplant Surgery, the University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.

ABSTRACT
Reinforcement of tissues by use of textiles is encouraged by the reduced rate of recurrent tissue dehiscence but for the price of an inflammatory and fibrotic tissue reaction to the implant. The latter mainly is affected by the size of the pores, whereas only sufficiently large pores are effective in preventing a complete scar entrapment. Comparing two different sling implants (TVT and SIS), which are used for the treatment of urinary incontinence, we can demonstrate that the measurement of the effective porosity reveals considerable differences in the textile construction. Furthermore the changes of porosity after application of a tensile load can indicate a structural instability, favouring pore collapse at stress and questioning the use for purposes that are not "tension-free."

No MeSH data available.


Related in: MedlinePlus

Image of TVT with (a) all pores, (b) effective pores, (c) pore frequency in dependency of pore size (estimated by simple square root of the pore area), and (d) textile and effective porosity at mechanical strain of up to 1000 g (8.9 N/cm).
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fig3: Image of TVT with (a) all pores, (b) effective pores, (c) pore frequency in dependency of pore size (estimated by simple square root of the pore area), and (d) textile and effective porosity at mechanical strain of up to 1000 g (8.9 N/cm).

Mentions: The meshes are fixed with magnets on a metal plate without any forces applied. The textile porosity of the TVT is 50.1% whereas the effective porosity considering only large pores with a diameter of >1 mm to all sides is 0% (Figure 3). Due to the fact that several pores are just at the limit of 1000 µm distance between filaments, the determined value for the effective porosity could be dependent on the area, where the sample is measured, and is sensible to smaller changes in mesh production and sample handling.


High structural stability of textile implants prevents pore collapse and preserves effective porosity at strain.

Klinge U, Otto J, Mühl T - Biomed Res Int (2015)

Image of TVT with (a) all pores, (b) effective pores, (c) pore frequency in dependency of pore size (estimated by simple square root of the pore area), and (d) textile and effective porosity at mechanical strain of up to 1000 g (8.9 N/cm).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4417993&req=5

fig3: Image of TVT with (a) all pores, (b) effective pores, (c) pore frequency in dependency of pore size (estimated by simple square root of the pore area), and (d) textile and effective porosity at mechanical strain of up to 1000 g (8.9 N/cm).
Mentions: The meshes are fixed with magnets on a metal plate without any forces applied. The textile porosity of the TVT is 50.1% whereas the effective porosity considering only large pores with a diameter of >1 mm to all sides is 0% (Figure 3). Due to the fact that several pores are just at the limit of 1000 µm distance between filaments, the determined value for the effective porosity could be dependent on the area, where the sample is measured, and is sensible to smaller changes in mesh production and sample handling.

Bottom Line: The latter mainly is affected by the size of the pores, whereas only sufficiently large pores are effective in preventing a complete scar entrapment.Comparing two different sling implants (TVT and SIS), which are used for the treatment of urinary incontinence, we can demonstrate that the measurement of the effective porosity reveals considerable differences in the textile construction.Furthermore the changes of porosity after application of a tensile load can indicate a structural instability, favouring pore collapse at stress and questioning the use for purposes that are not "tension-free."

View Article: PubMed Central - PubMed

Affiliation: Department for General, Visceral and Transplant Surgery, the University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.

ABSTRACT
Reinforcement of tissues by use of textiles is encouraged by the reduced rate of recurrent tissue dehiscence but for the price of an inflammatory and fibrotic tissue reaction to the implant. The latter mainly is affected by the size of the pores, whereas only sufficiently large pores are effective in preventing a complete scar entrapment. Comparing two different sling implants (TVT and SIS), which are used for the treatment of urinary incontinence, we can demonstrate that the measurement of the effective porosity reveals considerable differences in the textile construction. Furthermore the changes of porosity after application of a tensile load can indicate a structural instability, favouring pore collapse at stress and questioning the use for purposes that are not "tension-free."

No MeSH data available.


Related in: MedlinePlus