Morphologic evaluation of the use of a latex prosthesis in videolaparoscopic inguinoplasty: an experimental study in dogs.
OBJECTIVE
To evaluate the morphological aspects of the behavior of 4 types of latex biomembranes implanted in preperitoneal videolaparoscopic inguinoplasty.


METHODS
Sixteen inguinoplasties were performed in 12 dogs: group 1 received an impermeable latex biomembrane in the right inguinal region and a prolene prosthesis, as control, in the contralateral inguinal region; groups 2, 3 and 4 received latex biomembranes respectively containing impermeable polyamide, 1-mm thick porous polyamide and 0.5-mm thick porous polyamide. Macro- and microscopic evaluations of the inguinal region and of the removed implants were made on the 7th, 14th, 21st and 28th days in group 1 and on the 28th postoperative day in the other groups.


RESULTS
We observed absence of hematoma, seroma and infection; presence of tortuosities; induction of vascular neoformation, inflammatory reaction and collagen deposition, and full encystment of the latex biomembranes, except that with fine porous polyamide, which was partially incorporated, with the formation of microcysts. No latex biomembrane induced fibrosis as observed in the prolene control group.


CONCLUSIONS
The biomembranes maintain induction of the healing process without fibrosis, are fully encysted and, except for the one with fine porous polyamide, are not incorporated into adjacent tissues. The latex biomembrane, with or without polyamide, is not recommended as a separate material for preperitoneal inguinoplasty.
Department of Surgery and Anatomy, FMRP, USP, Ribeirao Preto, SP, Brazil. drluizhs@terra.com.br
Luiz Henrique de
LH
Sousa
Reginaldo
R
Ceneviva
Joaquim
J
Coutinho Netto
Fátima
F
Mrué
Luiz Henrique de
LH
Sousa Filho
Orlando de
Od
Castro e Silva
D000818:Animals; D001672:Biocompatible Materials; D001705:Bioprosthesis; D004285:Dogs; D006552:Hernia, Inguinal / Q000601:surgery; D007264:Inguinal Canal / Q000601:surgery*; D007840:Latex / Q000627:therapeutic use*; D008297:Male; D008422:Materials Testing; D008567:Membranes, Artificial; D023421:Models, Animal; D011184:Postoperative Period; D011474:Prosthesis Design; D019919:Prosthesis Implantation / Q000379:methods; D020535:Video-Assisted Surgery; D014945:Wound Healing
D001672:Biocompatible Materials; D007840:Latex; D008567:Membranes, Artificial