title: Mosquito net mesh for abdominal wall hernioplasty: a comparison of material characteristics with commercial prosthetics.
abstract: BACKGROUND
  The use of sterilized mosquito net as a cheaper alternative to commercial mesh used in hernia repair has previously been published. However, as no standards with regard to the material have been documented, we aimed to define the characteristics of a commonly available and low-cost mosquito net, which has already been shown to be clinically efficacious in groin hernia repair. We compared its characteristics to other commercially available meshes, in keeping with the well-established FDA and MHRA regulatory processes.
  
  
  METHODS
  The macromolecular structure of the mosquito net was determined by vibrational spectroscopy. The ultrastructure of the meshes was examined with scanning electron microscopy, and uniaxial and burst tensile strength testing was performed. The following parameters were assessed: polymer type, filament characteristics, pore size, weight, linear density, elasticity, and tensile strength.
  
  
  RESULTS
  The mosquito net was a polyethylene homopolymer, knitted from monofilament fibers with a mean filament diameter of 109.7 μm and a mean mesh thickness of 480 μm. The mean pore maximum diameter was 1.9 mm, with 91.2 % porosity, 53.7 g/m(2) mean mesh weight, and a linear mass density of 152 denier. This was comparable to the "large pore" (class I) commercial meshes. The bursting force for polyethylene mosquito net was greater than for UltraPro and Vypro (43.0 vs. 35.5 and 27.2 N/cm, respectively), and the mosquito net exhibited less anisotropy compared to the commercial meshes.
  
  
  CONCLUSIONS
  The material and mechanical properties of the polyethylene mosquito net are substantially equivalent to those of commonly used lightweight commercial meshes.
authors: Department of Surgery, Royal Cornwall Hospital, Truro, TR1 3LJ, UK. dsanders@doctors.org.uk
authors: David L
authors: DL
authors: Sanders
authors: Andrew N
authors: AN
authors: Kingsnorth
authors: Brian M
authors: BM
authors: Stephenson
mesh_terms: D004548:Elasticity; D059685:Herniorrhaphy / Q000295:instrumentation*; D006801:Humans; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D057147:Mosquito Nets; D020959:Polyethylene / Q000737:chemistry; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D013526:Surgical Mesh; D013718:Tensile Strength
chemical_list: D020959:Polyethylene